Bitlbee is a proxy which accepts connections from any irc-client
and allows you to communicate using following instant messaging
protocols:

 - AIM/ICQ (oscar)
 - XMPP/Jabber
 - MSN Messenger
 - Yahoo! Messenger
 - Twitter (and API compatible services like identi.ca)

Flavors:
 * libpurple - Enables a backend using purple library allowing
   to communicate with even more chat networks like Gadu-Gadu,
   MySpaceIM, Groupwise, Sametime, SILC etc.
 * otr - Enables Off-the-Record (OTR) Messaging to have private
   conversations.
